[vala] (5 commits) Non-fast-forward update to branch wip/tintou/ges-metadata

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/tintou/ges-metadata' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  731818d... gst-editing-services-1.0: Add GIR metadata

Commits added to the branch:

  ad08aeb... javascriptcoregtk-4.0: Fix GLib.Callback parameters which c (*)
  30a619b... libvaladoc/girimporter: Skip "source-position" elements (*)
  23e0df7... Revert "codegen: Use copies of error_variable of catch-clau (*)
  1dd63ca... tests: Add asynchronous "catch-error-scope" regression test (*)
  c246375... gst-editing-services-1.0: Fix some construtors and (un)hide

(*) This commit already existed in another branch; no separate mail sent